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Is Miracle Gro Toxic or Safe? (Pets, Animals, Garden& More)

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Who would not want strong and full plants in their gardens? It requires skills and extra effort for sure. But with Miracle-Gro, anyone can achieve a fruitful result. 

Miracle-Gro helps a gardener grow big, bushy, sturdy plants and fast-growing successful seasons. Yet, some may doubt its benefits and consider it unsafe since it is a synthetic fertilizer.  

So here we have details on whether Miracle-Gro is safe to use, harmless to pets and other animals. 

Is Miracle Gro toxic to pets & animals?

Miracle-Gro is non-toxic to pets and animals. The ingredients used are considered safe by the Food and Drug Administration. It can, however, cause gastrointestinal irritation, diarrhea, and vomiting if over-exposed by animals and pets. Hence, pets or animals need close monitoring if they ingest it.

Miracle-Gro claims their products to be harmless to animals and pets. It is also safe to grow plants. This product comes in both solid and liquid forms. They are good to use in all types of plants starting from indoor plants to lawn plants to trees and shrubs.

Over-exposure to it may harm the animals negatively. However animal owners reported their animals to be safe from Miracle-Gro exposure. Here is a list of animals to see if Miracle-Gro is harmful to their health or not. 


Dogs may get attracted to the smell of the Miracle-Gro potting soil and fertilizer. It is safe for them. However, over-exposure or regular ingestion of Miracle-Gro can have negative consequences. 

So when you apply Miracle-Gro in your garden, do not let your dog enter the treated area for at least a few hours or a day. If exposed, monitor symptoms of sickness. 


Miracle-Gro is declared not harmful for your cats as well. Nevertheless, this should not mean that you let your cats ingest or get overexposed to it. 

Even if it is all-natural, ingredients other than suitable for a cat to eat could harm them. So once applied, do not let your cats wander the place immediately. 


Miracle-Gro contains completely safe ingredients for rabbits. A little ingestion of this potting soil is not poisonous to rabbits.

However, avoid over-exposure and monitor your rabbits if ingested. The vegetables eaten by rabbits are safe to grow in Miracle-Gro.     


Many consider making soil beds for their pet snakes with Miracle-Gro. It is safe. 

This bedding when treated, would not harm the snakes anyway. Make sure not to put your pet snake immediately after making the bed. 


Miracle-Gro is again non-toxic to big animals like horses. The ingredients are all-natural.

They can run on the Miracle-Gro bedding gardens. And can even eat the greens produced in this fertilizer. However, after the treatment of Miracle-Gro, let the horses use the bedding. 


Bees travel around our garden, and many people do bee farming. It is safe to use Miracle-Gro potting mix and fertilizer. Bees are not at all hurt by the use of it. Bees can even use the flowers and plants grown in this fertilizer. 


It is not poisonous to birds when you use Miracle-Gro in the gardens. However, a gardener should be careful in using the exact way as instructed.

Again, since fertilizer cannot be an ideal food for a bird, it is better to keep the packaging anywhere safe. 


Miracle-Gro may reach the fish through drains and rainwater. Many use Miracle-Gro potting soil in their tanks for soil bedding. It is safe. 

However, we should remember this is not a usual food for fish. Hence, use the right amount in proper ways. 


Miracle-Gro is safe for toads as well. This synthetic fertilizer is even safe for earthworms. So it is obvious it won’t harm the other animals as well. Make sure to use it properly and let the soil soak and treat the fertilizer. 


Miracle-Gro is not poisonous to chickens. The ingredients are all-natural and safe for chickens even after ingestion. However, be careful not to let them over-ingest.  


As Miracle-Gro potting soil and fertilizer contains no poisonous chemicals, it cannot harm the squirrels. 

Squirrels find it amusing to dig the soils mixed with miracle-Gro. Also, any negative effect on squirrels was not reported. 

Is Miracle-Gro Safe For Your Garden?

Miracle-Gro is safe to use in gardens. The all-purpose formula of Miracle-Gro is harmless to vegetables and other plant growth. Even if some may consider it a mere synthetic fertilizer, it contains all-natural ingredients. Produces from Miracle-Gro treated soil bed is safe for a human to consume.

Miracle-Gro is a mostly water-soluble formula. The company also produces organic line products. All these products are standard and perfectly safe to use in crops and vegetables.

Miracle-Gro contains potassium, nitrogen, and phosphorus in non-toxic amounts. The ratio to nitrogen, phosphorus, and potassium is 21-7-14. 

Here we have details on the impact of Miracle-Gro on the different types of vegetation

Plants & Trees: 

It is safe to use Miracle-Gro on plants and trees. The formula is made harmless and helps enhance growth.

The perfect time to fertilize using Miracle-Gro for a plant would be April to June. Spread the fertilizer at the drip line or spread at the outer edge of the root ball. 


Miracle-Gro is food for your plants. It is again safe to use in vegetables. When used correctly, it would not burn your vegetation. 

The products grown in the Miracle-Gro mixed field are not harmful for human ingestion. However, wait at least two weeks for fertilizer to absorb by plants.  Also, wash your vegetables before eating. 

The best formulas for growing tomatoes, herbs, vegetables, and fruits are the organic Miracle-Gro® Performance Organics® Edibles Plant Nutrition.


Flowers bloom nicely in the presence of Miracle-Gro potting soil mix. The formula for the flower is the Miracle-Gro® Water Soluble Bloom Booster®. 

It also gives a nice vibrant color. On a flower bed, you can apply the Miracle-Gro® liquid formula with a watering can. Do it every 1 to 2 weeks. It is again totally safe to use Miracle-Gro for flower production. 

Indoor Plants:

Miracle-Gro is safe to use on indoor plants. It will not harm the plant growth or put any negative impact on the indoor environment. 

You can instantly apply Miracle-Gro® Indoor Plant Food on indoor household plants, including edibles. You can either mix the formula directly or dilute it with water. Use it once a week. 


For herbs, Miracle-Gro is once again safe. You can use the water-soluble formula easily and instantly. It is going to give you a plentiful harvest.

Also, it is safe to consume the herbs grown on this fertilizer. Wait for a little before you pick up the herbs to eat. And also don’t forget to wash. 

Lawn Grass: 

The Miracle-Gro® Water Soluble Lawn Food is a specially formulated fertilizer for lawn grasses. It is the best and fastest way you will get thick, green grasses on your lawn. It is also safe for your pets and other animals to roam on the grass. 


Miracle-Gro potting mix contains a blend of aged bark fines, plant food, sphagnum peat moss, perlite, and a wetting agent. It will help the garden soils to improve in quality and build strong roots. It allows the plants to feed nutrition for up to 3 months. 

The soil is safe to use in gardening, bedding for other animals and pets. 

Is It Safe To Eat Food & Vegetables Grown With Miracle-Gro?

As it is a synthetic fertilizer, many may doubt Miracle-Gro use on edible vegetation. However, they are formulated safe for use. The ingredients are approved by the Food and Drug Administration

The plants will grow strong, bushy, and healthy. The All-Purpose Plant Food Fertilizer contains 24 percent nitrogen, 8 percent phosphorus, and 16 percent potassium. The formulas do not carry any carcinogens. 

Use Miracle-Gro as instructed. Also, for edible plants, wait for at least two weeks before you pick them for eating. Also, wash the veggies beforehand. 

What plants are miracle grow good for?

Miracle-Gro is one of the best for myriads types of plants. The company has many formulas for different kinds of vegetation. 

The Miracle-Gro All Purpose Plant Food is safe for growing all types of vegetables and plants. Also, use it in proper ways and as instructed to avoid root burning. You can apply it at any time of the day. 

The list of plants it is safe to use for are, 

  • All kinds of flowers
  • All kinds of vegetables
  • Indoor plants
  • Roses 
  • All types of trees
  • All types of shrubs and herbs

Final thoughts

Miracle-Gro does not harm animals, pets and is safe to use. The ingredients are all-natural. However, do not let any animals get over-exposed to it. Miracle-Gro products contain all essential nutrients for fruitful gardening. Use it anywhere from indoor to the backyard to making bedding for pets.

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